42 furnace air flow direction diagram
How to Determine Correct Furnace Filter Direction - YouTube A furnace filter has one side that allows it to "breath" fresh air through, while the other side traps dust and particles from the air. If improperly install... PDF INSTALLATION INSTRUCTIONS - Lennox When this furnace is used with cooling units (figure 3), it shall be installed in parallel with, or on the upstream side of, cooling units to avoid condensation in the heating compart-ment. With a parallel flow arrangement, a damper (or other means to control the flow of air) must adequately prevent chilled air from entering the furnace.
Determining Air Flow Arrow Direction to Properly Insert a ... The Arrow and Air Flow Direction To properly insert a new filter, look for the arrow! The arrow on your filter should always face the unit and away from the return air duct that carries the air that will be heated or cooled. HVAC systems push the cool or warm air out and pull spent air in, recirculating the air thr...